Explains what the four spheres of the Earth are, and the interactions between them.

This interactive activity adapted from A Science Odyssey Web site helps you visualize different types of plate tectonic activity and shows the impact this activity has on Earth's surface.

Interactive resource on the solar system and earth. Engaging site for students and teachers provides a fascinating look at the planetary system. Includes videos, photos, text, quiz.

Focus is on the hydrosphere and contains the definition as well as characteristics of the ocean and the effect of the ocean on climate.

Explore navigation methods by sea, air, and space, what latitude and longitude mean, how GPS works, about satellite navigation, and learn about professional navigators. Includes a timeline of developments in navigation from 1280 to the...

The Great Lakes include, Superior, Michigan, Huron, Erie and Ontario. These lakes form the largest fresh water system on earth and they are North America's greatest natural resource. Learn about the different lakes, how they formed,...